Comment 4 for bug 1583655

Kolla is using --net host solution, so the hostname is not changeable.

another solution is use --add-host <hostname>:<ip> parameter, but it will overwrite all the host os's /etc/hosts file. not optimal too.

btw, here the official explanation about why rabbitmq requires hostname resolve.

[0] http://www.rabbitmq.com/networking.html#dns